SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58f946f65a770a5cd0851b8f63d1d5966ec93e8c7fcbfa1f34df27602b7d9337' 
  AND token = 'pJazvYPCwA1wraCykNBX4jl5GX7XG1UGew/UrsspMSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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