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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8ac22eefaad3f2e7c64d27165aebaa0e41893fc853fecf6ad5ae4252c83da029' 
  AND token = '32uiORMq9fNV+MO/vrK3+e3PHNZ/CTEmE1WJTRm9jGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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