SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e25eb71f15336107b2f7b293ab153467936643d83d247904a35d94d2a6bc6b6' 
  AND token = 'Z3J5C1DbwK4icN2UvIvkX0dhFMfPzUjbGL+QoZdMMUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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