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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8793bff398e9e8cb9dd2943e852f79b25f158c5c345bae9947488ede7be58cc2' 
  AND token = 'NMjXALiT9Wsz0VI9TOs2yXDbGn9TEx1uTrnNhaC/PQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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