Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7d8efb3673d40f7943eea2b896ae043684fe2fe983730b8314f4144fbddbe42' 
  AND token = 'L9ylSxgz1Rp/w6p08voSRJk/vRPcwLUkMo/RiSL3R2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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