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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63ad752961043b3eb47117b08d112b4d56198193cb50203b0c496a911eefa1c5' 
  AND token = 'P75EU5C0sSZTBtt00FgU0MfPLXZs5aihbb4mu1/pOxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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