Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6961204469d3234962fcf2e4990c7de6206d7b917c594de3c1c33177b207bfc5' 
  AND token = 'lvZNpy7WFrlCHAtXzx2BIKx6h83RioG33DHhtZzWzsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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