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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1195b42365340b313b0a5d05bc9a408cf1b797d054d665898dfa4dff98da42ac' 
  AND token = 'sIuWxvmlLAEyXLYv9sN1sH1rgGF4e3n0KcQia1JO5sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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