Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b8654d110c3235fceccef7329350c684311d1bed121e16491db3e8aa44c57f03' 
  AND token = 'dDCTFdJtRJWFmQ3kyAVsMYWN6MHt7+u/MASnjTrRncE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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