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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0563af6d7c537226c866915f3e34af0d0271c4f8f808e0a3e7b42ff2ec1e8f6b' 
  AND token = '9zPaWC9xbiF+bOTfcZDA59ww5gVW8sRQ2kxOURKUIRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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