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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b164a5412e987ce5d98f0185b827fed68a44db6abe1c1765a13f4487db8e330' 
  AND token = 'dEN4cMR3vC5neuucoAt7StFGjgX5VqQa3Hfi/joEys8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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