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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5479210f90b05ef7c8967045ecd35e7979df47a4b05ba9363e61f75602f1c4db' 
  AND token = 'LNoI7nY1W+opQnVVM8qufUNTmhmr7+a0a2Ks+wMz1ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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