Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e516898d627d74cdadc38d54e0744170af9515f8cad161d0689ca87ce66fefb1' 
  AND token = '+3lUkcfNGctGMePMUqYW8NuCqgCjbWrkRae8lNfl0Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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