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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00b7b0885d272fe7424fcb12bf02b9489fb10732a0f44d6eb4ebc6fe172a547e' 
  AND token = '7G3SmIyToXtaNsDI4vtGRMXqw0/oCWnFsyAop8iW+/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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