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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1afe9c8413b00aec778ca15dd0c96aca72b97a8cbab08d380162a71dc35cf3a8' 
  AND token = 'yMv8+Bku4cgxbaPoOoX3vuK9i9Q+o5jCs7V/Q1MKabA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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