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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f4d8abe9753a77c11737c04845c8594a0b82ceba42410b2a450016f1bc0e0a5' 
  AND token = 'YlVzP/f1XHTP1ev9tAQmkgX7bS2Hefc9IqT7lawk7zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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