Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58775ec23897e31cf45710e298160324d959f1170c72fa456b740f25378e0e05' 
  AND token = 'l/oYUOEhRiBj0tkbnZCTLdY+/KckpObuQEVLQkLR8R4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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