Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5dcc2b780303349615f3b6737a94e19998702f68adb1aba46db07ae9866de62' 
  AND token = 'g5HwJAH2Csp9kWlFmm9gzD0cd223qi4RlLCCzVHuRV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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