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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee7f801249f832a9be48068c9b7ac7527d35a3584e62df242ca048afef582cb6' 
  AND token = 'PQLLyQ5n0mrAUuAycbJgbPc0DWwfRp+U3MtjXt0glA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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