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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b4b9916d78d790b28849808c019cb4a4c666c95691368d9ee968c4277be4d36' 
  AND token = 'WyXG/Cp4+mn1bb5UNGW+DvU2ZeENV5IU+93C7JLSB6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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