Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b28768df0274bfe1cf77b74707b47ed714735d09e6ad4e09244d34d8c803b487' 
  AND token = 'gJq3aifTOjMViY1cMabbgBawmeLYqDUAoncVL1/8eAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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