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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'afbe8beae0183fdfa5eb1247b51c930c0354a1201c28361d02b6c327acce11f2' 
  AND token = 'AnW3+IqR6ndPUti6i9Y+604A3HF6Xdghy/h7oKHHI8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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