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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc33247ee1062e920c317a0d58b5216e76971354b4ded9cd99809aff4ddf5cd5' 
  AND token = 'zkwiI4qJrFHyW94B7//y3TPomANT1TbB/GyHih9WHDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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