Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a9c043be22f0baf286ca299240a6e57ab7930fd2cf743c14b16aef4d49d3ef0' 
  AND token = '8rPb8nzOPO+asFDRKxmu5OIeK3ShcGY4AhTCxRA1lfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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