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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64508c275013d70ed9d43e446f5d22ea8c2d90dfdad5f2cedf8c0230c4ac4477' 
  AND token = 'jTtxGsqnwni6UGoatGmODTNysfhdChjwSgmjeOcsovQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00766

JSON explain

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