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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '922e4172fec8a440e13a6ea258adf861facf2f34895c29a3c538003f8036ed9b' 
  AND token = 'B0l22F02+oyJh/2r6d/E5XyLFbKHEj9g1wfz0SKLY9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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