Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e083d0e58ae8d0c30f15d26fda81f926b1374e5e241d1bba54d1e34616904eb' 
  AND token = 'cRLrQiJyHC4Juge5IArhqQ5aJFfMUyCvoGqyE3BwJvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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