Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dbb375680ec64bb5b5beef26723f846eafd3d556dce6aad4d5c936e2c1a9afd' 
  AND token = 'HEXsL2BHD4BANv/dKQc9qUk4XbJK920MJuXHIfRUp4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}