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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0079a731c6e0eba7fca8cf4c0adcc74257f1bdcba80279931266434e64b2eee' 
  AND token = 'Fa0y9zmg5OSTm2+E8u10NskJbx8NZKQQP6uuT4Fo1Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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