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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '50f95d9a6394b04626d5a5eb4b13579de6e0d4b183126072d996f1c85729b130' 
  AND token = 'WraPwbYMQm1aM7Oz1mpkt/5+Rib7StVvqNsarCj+Mq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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