Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c198b7b3e973805bf345a446576df7e2fbc096dca67a201ffe4657b0d4e83d0c' 
  AND token = '9pgBM7d3QdMpW1lZS6ua6ykeCsC6keOlnSeg7h7Vu5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}