Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc0cb490ed66be67b309d03adc283e6ff202364cc1e5d3abe9d04acbbe18d955' 
  AND token = 'zCXOyilqRt63/Wgr5crTkuOPtp404fKN2MbjTpI2ALU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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