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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d17db1e2c8eb0b7dc8bc9266ad6c522881c7c50fb5bf1a5dc9b640ba9130ee0' 
  AND token = 'DPfIjfZ+wRiy25SH0V9E0h4OrqC3JvugRvt+k0PPzL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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