Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3598cda58a872fdf2f7677522ac1d25d1ce9a9ac3cd44e5d0e6fb02e9fd92e53' 
  AND token = 'lOgPcPiDMGplvdCudiRtfB1fILgPsxfZ7LXf4tZwr0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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