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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'decee903e89c8dfbcfe280f778ae22495f464576e6c4f17e38e97692ccffbf5f' 
  AND token = 'UARnyu04X2+o24RUdFyUMociv1xzDOADkmMd9rvRG/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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