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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0a0a147c86cf3b5ccd52d3063973765dad4cf4f846df696fa4883bbe885ae52a' 
  AND token = 'KpcjxN+mis7MhRPL8hMvhvXCrNk1nWr65rCjNu1+D5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}