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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec47d8560096a927570fcb7c864ac299dbd28546bb99b04c497015a1b440522' 
  AND token = 'uPe6w4vI5bu+/2BzTKBd59KBK/clebFn+NmdtP6xMa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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