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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1e3e07f9e2d90876240c6cd110adbea36fb3255647235fa274b6628babe8e4b' 
  AND token = 'd/FUHnB6/e59aEKO06Q3yN8OhJzGgyWpzTB1fRFYAPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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