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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092cf2a75c2b090c0a4cbb9b148cbb6c9ca81678207cb30eb808c75281eb2d38' 
  AND token = 'XtfCr971IOFD5AhsBY3E2/smBy5bVmXIMb6DzuOGH6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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