SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1c301e61f48afc33572cfeaffb7b8a4b119bbe0c4d3662348db9c64022c6fb0' 
  AND token = 'IjAssNRN4jaxurpkBSFwYLT8Z+Mxg7S7C9G50wHZn1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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