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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaa53181e4737d448ba661fb1b73cf10a554c498842adee6bd8120537a95aad0' 
  AND token = 'rju9Ayf/lPe62/CsajdcJ0w08fOYOiJFvTk0zUWK1Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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