Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '367020b8f4cf1de21a09d577861d3303653bfaeb5aa855f714f451db329f1fae' 
  AND token = '/YA5FQlqpb+hcPRbHdX05U81eYiwKr7DNA7pJlTgPoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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