Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49e5d85f895b6937f52008879d7eb3a132b76fc7fef1941625d8ff88da19962b' 
  AND token = 'G040DDjx8S/eWiSwL71AP4IAtB1BkOw0hZAew/VN5l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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