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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '066f1378b5bff8533853fcd702de3bb841bea5f97c95cbbcc0a3a3aa51dfc8e0' 
  AND token = 'lK7DLFuMH0fOsDGSfEcZutnoI6Vd2LNilFW+Ol4ws4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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