SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f05869d457b5b8c01b527b2a14b1e98d02583c77d36e8f03a374cf6349e57630' 
  AND token = 'G9TTRNrGWQIWz7oEBtJA4XxYxvPrw2n2CpyBEYJ/mS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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